Finding the Fourth Proportional to 21,377.13, 32,072.18 and 10,280.67

Step by Step Solution

1. Step 1: Write the proportion equation
   21,377.13 : 32,072.18 = 10,280.67 : x
2. Step 2: Convert to fraction form
   21,377.13/32,072.18 = 10,280.67/x
3. Step 3: Cross multiply
   21,377.13x = 32,072.18 × 10,280.67
4. Step 4: Simplify right side
   21,377.13x = 329,723,498.76
5. Step 5: Solve for x
   x = 329,723,498.76/21,377.13
6. Step 6: Final answer
   x = 15,424.12